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5.17 ADD-ON INSTALLATION
As mentioned in
Section 5.5 Parallel installation
, it is permitted to make a parallel installation, in the United
States only, of your Caddy Alterna II with an existing furnace by respecting the conditions stated in
Section 5.5
Parallel installation
.
To ensure a safe installation, both furnaces must never run at the same time. To do so, the thermostat
controlling the existing furnace must be wired to the Caddy Alterna II furnace link board. This way, when a heat
signal is given to the existing furnace, the Caddy Alterna II furnace will receive the same signal which will tell it to
stop. If, on the other hand, the Caddy Alterna II thermostat sends a heat signal to the Alterna II furnace, the
signal from the existing furnace’s thermostat will override the Caddy Alterna II thermostat heat signal which will
prevent both furnaces to run at the same time.
The wiring for an Add-
on installation is shown below. The existing furnace’s thermostat must be connected to the
Rh
and
Aux
terminals of the link board on the Caddy Alterna II furnace. Those two wires must come from the
R
and
W
terminals of the existing furnace’s thermostat so the link board receives the heat signal.
When a heat signal from the existing furnace’s thermostat will be sent, the Caddy Alterna II furnace will shut
itself down and an envelope will appear on the LCD screen indicating that the existing furnace has taken over.
This envelope will disappear as soon as the heat signal of the existing furnace’s thermostat will stop and the
Caddy Alterna II furnace will resume getting orders from its own thermostat.
Summary of Contents for CADDY ALTERNA II
Page 83: ...83 12 EXPLODED VIEWS AND REPLACEMENT PARTS...
Page 84: ...84 SECTION A SECTION B...
Page 85: ...85 SECTION C SECTION D...
Page 86: ...86 SECTION E SECTION F...
Page 87: ...87 SECTION G SECTION H...
Page 88: ...88 SECTION I SECTION J...
Page 89: ...89 SECTION K SECTION L...
Page 90: ...90 SECTION M SECTION N...
Page 91: ...91 SECTION O...
Page 92: ...92 HARNESS SECTION...
Page 93: ...93...
Page 94: ...94 TELECOMMUNICATION WIRES SECTION...
Page 95: ...95...
Page 96: ...96...
Page 97: ...97...
Page 101: ...101 13 GENERAL ELECTRIC DIAGRAM...
Page 104: ...104 15 3 HOT WATER OPTION 15 4 24V ADDITIONAL EQUIPMENT 15 5 AIR CONDITIONING DAMPER...
Page 105: ...105 15 6 HUMIDIFIER 15 7 HEAT PUMP...